Compléter Intermediate U3 vocabularyVersion en ligne Word search to check new vocabulary par Mariana Rial 1 potential assume consensus leaders migrations belong migrate collective coordinated realize formation efficient Usually most humans to groups that have . However , can we that other species act in the same way ? There are some situations in which actions or decisions are made through . In this way they act toghether as a community . For instance , birds practice behavior by flying in a specific perfectly because it is an system to safety . Other species like fish also use this system and when they see a predator they all work together to avoid it and to complete their in the safest way . Scientists that this behavior is beneficial to protect the group from predators .
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